Sharpener for safety-razor blades



1921 '2' Sheets-Sheet 1 Ill/VENTOR (1M. San/1J2 A TTOHNEVS H b .MN...

om wx \w w he Jan. 29 1924.

J. M. SCHILTZ SHARPENER FOR SAFETY RAZOR BLADES Original Filed Nov. 25.

Q Q Q Q m WITNESSES Jan. 29, 1924.

J. M. SCHILTZ SHARPENER'FOR SAFETY RAZOR BLADES Original Filed Nov. 25. 1921 2 Sheets-Sheet 2 gum A Tron/ms atente'el den, 1924} aaaaee JOHN M. SCHILTZ, OF FQRT WORTH, T i :u

SHARPENER FOR SAFETY-RAZOR BLADES.

Application filed November 25, 1321, Serial No. 517,627. Renewed December 7, 1933.

To all whom it may concem:

Be it known that I, JOHN Somurz, a citizen of the United States, and a resident of Fort Worth, in the county of Tarrant and State of Texas, have invented a new and Improved Sharpener for Safety-Razor Blades, of which the following is a full, clear, and exact description.

This invention has relation and particularl refers togan apparatus for stropping and s arpenin safety razor blades and seeks for its genera object to produce a simple, inexpensive and highly efficient device of this character which Wlll operate on blades of practically all of the standard types now in neural u s a further object the invention contemplates a stropping or sharpening device which simultaneously operates on the opposite sides of each edge of a double edged blade and which alternatel opposite side of a single -e ge blade, thereby eliminating "the necessity of removing the blade from the device to eiifect the sharpening of all of the sides ofthe blade ed es.-

is a further object the invention aims to provide means to permit of the read association or dis-association of the blades with the device. I

With the above recited-and other objects in view, the invention resides in the novel construction set forth in the following specification, particularl pointed out in the appended claims and illustrated in the accompanying drawings, it'being understood that the rlght is reserved to elmbodiments othe than those actually illustrated herein to the full extent indicated by the general meaning of the terms in which the claims are ex ressed. v

n the drawings-'- .Figure 1 is a perspective view of the blade sha ner.

Fig. 2 is a longitudinal sectional view taken approximate y on the line 22 of Figure 1, and illustrating the sections in shifted position in dotted lines.

Fig. 3 is a similar view illustrating the sections shifted in the opposite position.

"Fi 4:.lS a fragmentary lon itudinal sec-1 .tiona view taken approximate y on the line 4-4 of Fig. 6, illustrating in full and dotted lines the action of the reversing mechanism. Fig. 5 is a horizontal sectional view taken approximatelyv on the line 55 of Fig. 2.

o crates on the Fig. 6 is a transverse sectional'view taken approximately on the line 66 of 'Fig. 5.

F 1g. 7 is an enlargeddetail transverse I means.

Fig. 11 is a similar view illustrating the attaching means in bent position.

Figs. 12, 13, .14 and 15 are detail views of modified forms of blade carrying mem bers for use in connection with safety'razor blade of various types. I

Referring to the drawings by characters of reference, the sharpening or stropping device consists of a pair of slidably connected members 10 and 11 each of which includes an upper or lower wall 12 and parallel right angularly disposed side flanges 13, the terminals of which are bent to produce a dovetailed bead 14. The dovetail beads of the a section 10 are adapted to receive the dovetail beads of the section 11 whereby said members 10 and 11 are connected for relative longitudinal sliding movements. Each of the members are provided on the inner surface of their walls 12 with a blade sharpening element 15 consisting of a' block or base 1.6 and outer covering consisting of parallel diagonally disposed strips 17 preferably of leather. The-forward and rear extremities of the blocks 16 are chamfered or down-turned as at 18 for a purpose to be'h'ereafter set forth. Each of the mem-- bars 10' and His further provided with parallel rack bars 19 disposed interiorly at opposite sides of their walls 12 at the juncture of the side flanges 13 therewith, said rackbars being. spaced from the side'edges of the sharpening elements 13 to produce therebetween a guide groove 20. The member 11 is provided adjacent its opposite ends with an upstanding end flange 21 while the wall 12' of the member 10 is cut away adjacent one extremity to provide a recess too side flanges 24 which embrace the extremities of the side flanges 13 while the 'opposite extremity of the wall 12 is provided with an end flange 21. The cover plate 22 is provided with rack bar sections 25 which are designed to align with the rack bars 19 when the same is in closed position. The opposite extremities of the walls 12 of the member 11 are provided with spaced parallel inclined portions 26 disposed in alignment with the grooves 20 defined by the rack bars and the opposite side edges of the blocks 16. ,The said inclined portions 26 are inclined downward and inwardly from the end flanges 21 at a point above the inner surface of the wall 12 and terminate adjacent the outer down-turned ends of the blocks 16 at a point below the inner surface of the walls 12 where they communicate with an opening 27 through the wall 12. The section 10, is provided with similarly'inclined portions 28 adjacent one extremity of its wall 12, said inclined portions being formed in the cover plate 22 at its opposite extremity. The members 10 and 11 are each provided with manipulatinghandles consisting of 'transverselynrranged flexible yokcs 29 secured attheir opposite extremities to the medial portiom thereof to receive the hands oi": the operator."

A blade carrying element is adapted to be operatively associated with the members 10 and 11 which consists of a pair of relatively separable shanks or bars 30-and 31 each of which is provided at one ex-' tremity with a substantially diamond shaped head'32 which head is provided with a spaced receiving opening 33 designed to receive and accommodate the free extremity of the shank of the other member of the blade carrying element. The shank 31 is provided with longitudinally spaced pins 34 and the shank 30 with complementary longitudinally spaced receiving slots 35 for the accommodation of the pins 34:. Each head 32 is provided with an outwardly project- -ing trunnion 36 upon which a pinion 37:

' is mounted for rotation. The shanks or barsthe razor blade A which is illustrated in the 30 and 31 of the blade carrying element are adapted to receive and clamp therebetween referred form of blade carrier as a Gillette kids of the double edged type provided with longitudinally spaced openings B. To associate the blade with the blade carrying element, the shanks 30 are shifted longi tudinally to retract the free extremities from the receiving openings 33 of the heads 32 and relative separation of the shanks 30 and 31 ishad to disengage the pins 3 1 from the slots 35; the blade A is then arranged on the shank 31 with the pins 34 projecting respectively through the outermostopenings B. The shank 30 is then brought into flat contact with the shank 31 to' arrange the of extending into the openings 27.

masses on the member 10 contacts with the stop lug 40 on the member 11 at which point the recemed extremit of the wall 12 with the member 10 will ie disposed directly over the extremity of the wall 12 ot' the member 11. The cover plate 22 is then swung to open position as illustrated in dotted lines in ig. 3. The blade carrying member is then arranged within said extremity of the mem 1 her 11 with the pinions in engagement with the rack bars 19, the heads 32 resting on the inclined portions 26 and the teeth 38 th i rge cover plate 12 is then swung to closed position bringing the inclined portions 28 thereof into engagement with the opposite side of the "heads 32 and the rack sectibns 25 into enga ement with the teeth of the pinions 37 at diametrically opposite oints with respect to their engagement with the rack bars 19. The operator then inserts the right hand in the yoke 29 of the member 10 and the left hand in the yoke 29 of the member il'and proceeds to slide or shift one member longitu inally with respect to the other.

The initial shifting movement of the members sheets a, rocking ot the blade carrying member from the position illustrated in full lines to the position illustrated in dotted lines in Fig. 4;, thereby disposing the blade atjsubstantially a 15 angle to the horizontal. "Continued movement in the same direction eflects the sliding of the heads between the grooves 20 due to the interengagement of thepinions with the racks 19 of the members 10 and 11, thereby simultaneously drawing the strips 17 of the sharpening elements 15in opposite directions along the oposite sides of the cutting edges of the blade. QVhen the heads 32 of the blade carrying element have beenzadvanced to a point where inclination to etiect the drawing of the strip its engage with the end flange 21, the same be supported by the outer elevated end successive y drawing the sharpening or stropping elements alternately over the opposite sides of the opposite actuating e ges'of the blade. When the desired number of Sharpening strokes have been obtained the members 10 and 11 will be shifted to the osition illustrated in Fig. 3, whereupon tlie swinging of the cover plate 22 to open position the blade carrying element is removed and the members thereof separated 42 are then bent at a ri same whereby to dispose element illustrated in .Fi

edges of the blade 59.

' extending slot. In this form to release the blade.

The specific method of constructing and amembling the shanks or bars 30 or 31with the heads 32, as illustrated in Figs.- 8, 9, 10 and 11, consists in slitting one extremity of the bar 30 or 31 from its outer end as at 41 to provide parallel outer tongues 42 and an intermediate tongue 43, which intermediate tongue is rounded to provide the trunnion 36. The head 32 is provided with a slot 44 parallel to the opening or slot 33. The

slitted extremity is then inserted through the opening 44 and a tongue 45 is upstruck from the shank in spaced relation to the inner terminals of the slots 41. The tongues ht angle to project the same in the opposite direction to the tongue 45 whereby the same will overlie and cover the outer end of the opening 33. The trunnion 36 is then bent to offset the it concentrically from the outer end of the head.

In Fig. 12 a modified form of blade carrying element is illustrated for use in connection with a single edged blade C provided with a reinforcing rib D, in which instance the shank 46 is recessed as at 47 to accommodate the reinforcing rib D while the other shank 48 is fiat.

In the modified form of blade carrying .13 the shanks 49 and 50 are provided with complementary recesses 51 to accommodate a single edged blade. 52 provided with reinforcing strips 53 on its opposite side edges. In the modified form of blade carrying element illustrated in Fig. 14, the shanks or bars 55 are provided at their opposite extremities with slots and lugs 56 and 57, the latter engaging the semicircular recesses 58 in the opposite In the modified form illustrated in Fig. 15 the blade carrying element is specificall designed for the Durham duplex razor lade E' which is provided with a longitudinally the device, as Well as the blade carrying element, are made the wider to accommodate a blade of this type and the clamping bars 60 are respectively provided with an elongated slot 61 and a complementary lug 62 which is inserted through the longitudinally extending slot of blade. I claim:

' 1. A stropping device for safety razor blades comprising a pair of supporting members having stropping elements in opposed relation, a connection between said members for maintaining the same in spaced parallel relation and for permitting of relative Ion-- gitudinal sliding movements thereof, an oscillatory carria e removably positioned between said mem rs, interengapreable means on the carriage and on said supporting members for causing a reciprocable movement of the members in opposite directions upon manipulation of the device, means on the carriage for detachably associating a blade therewith, heads on the carriage engageable with the supporting members for limiting the oscillation of said carriage whereby to effect the forcible engagement of the sides of. the cutting edges of the blade with the stropping aces, means at the opposite ends of the supporting members, and means on the carria e heads engageable therewith at the opposite end of each stroke of the device for oscillating thecarriage.

2. A stropping device for safety razor blades comprlsing a pair ofstropping ele ments, means for maintainingthe same in spaced parallel relation and for permitting of limited relative longitudinalmovements thereof, an oscillatory blade supporting carriage removably disposed between said elements, i'nterengageable means on the carriage and on said elements for effecting a reciprocable movement of the elements in o posite directions upon manipulation of t e device, means on the carriage for limiting the oscillation of the same in opposite directions and for disposingthe sides of the cutting edges of the blade at an angle to and in the path of movement of the stropping elements, and interengageable means on the carriage and the opposite ends of the sharpening element adapted to coact at the end of. each stroke of the device for oscillating the carriage to dispose the blade at an opposite angle. p

3. A strapping device for safety razor blades including a, pair of members connected for limited relative longitudinal movement in opposite directions, a strapping element carried by each member, the stropping faces thereof being in spaced opposed relai reat one extremity of each shank, two edges of which are designed to slidably engage the members to dispose the blade at an inclination to the path of travel of the stropping elements, and. rotary pinions at opposite sides of the blade carrier for respective engagement with the rack bars whereby the blade and blade carrier are maintained against rocking movement during the en gagement and movement of the stro ping faces with the cutting edges of the bla e.

d. A 'stropping device for safety razor blades including a pair of members connect-- ed for limited relative longitudinal movement in opposite directions, a stropping element carried by each member, the stropping faces thereof being in spaced opposed relation, opposed rack bars carried by said members, a blade carrier removablyarranged between the members comprising relatively separable shanks for thereception and clamping engagement of the blade therebetween, a substantially diamondshaped head at one extremity of each shank, two edges of which are designed to slidably engage the members to dispose the blade at an inclination to the path of travel of the stropping elements, rotar pinions mounted at opposite sides of-the b ade carrier for re- SPBCtlVG enga ement with the rack bars whereb the' lade and blade carrier are maintained against rocking movement during the engagement and movement of the stropping faces with the cutting edges of-the blade, and interengageable means provided respectively on the heads and the opposite r extremities of the members adapted upon chan e in the direction of movement of the,

mem rs to enga e and coact for reversing the inclination o the blade to dispose the messes opposite sides of the cutting edges of the blade in engagement with the stropping faces.

, 5; A stropping device for safety razor blades including a pair of members connected for limited relative longitudinal movement in opposite directions, a stropshaped head at one extremity of each shank, 7

two edges of which are designed to slidably engage the members to dispose the blade at an inclination to the path of travel of the stropping elements, rotary pinions at'opposite sides of the blade carrier for respective engagement with the rack bars whereby the blade and blade carrier are maintained against rocking movement? during the engagement and movement of the stropping faces with respect to the cutting edges of the blade, and interengageable means provided respectively on the heads and the opposite extremitiesv of the members adapted upon change in the direction of movement of the members .to engage and coact for reversing the inclination of the blade to dispose the opposite sides of the cutting edges of the blade in engagement with the stropping faces, said means comprising oppositely inclined portions on the members, an apertured portion on the member and a tooth on each head.

JOHN SOHILTZ. 

